Oil burner



F. F. MILLER.

OIL BURNER.

APPLICATION VFILED fes. 24, 1921.

12429)?5@ v Patemed Sept. i9, 1922.

.. Mll/5%@- Patented Sept. 19, 1922.

OFFICE.v

OIL BURNER.

Application led February 24, 1921. Serial No. 447,618.

To all whom t may concern.'

Be itl known that LFBEDERICK FRASER MILLER, a subject of the King ofGreat Britain, residing at Napanee, in the county of Lennox andAddington and Province of Ontario, in the Dominion of Canada, haveinvented new and useful Im rovements 1n Oil Burners, of which theollowing 1s a specification. i

My invention relates to improvements 1n oil burners for use in furnacesand bollers. In the use of fuel oil in house furnaces and small boilersthe opening in the fuel nozzle of the burner requires to be lar e enoughso as not to clog up and with continuous burning such a nozzle will usean excessive amount of oil over the heating requirements of the furnaceor boiler.

The object of my invention is to intermit tently burn the fuelv and soreduce the consumption without using a separate lighting flame or pilotlight. I attain this object by the means illustrated in the accompanyingdrawing which illustrates-the'use in an ordinary-hot water heater orfurnace for a house.

Similar figures relate to similar parts throughout the drawingl is acombustion chamber inside the fire box of the furnace 3. It consists ofa shell A lined with heat-resisting and nonconducting material ormaterials such as a carborundum or fire clay refractory brick, backedwith a nonconductor of heat such as asbestos 5 and supported upon astand 4 and is shown in two halves held together by lugs 6 and 7 andbolts 2. By this means the parts can be made small enough to be placedin a furnace already set up, through the coal door G 'or ash door H andit can also be easily taken apart so as to renew the lining 5. I donotrestrict it to the use of a shell as A may consist of bolts and rodssuflicient to hold the different parts of 5 together or to the use of aseparator shell as in constructing a new furnace the shell A could bemade an integral part of the furnace and is not necessarily contained inthe fire box of the boiler or furnace but may connect outside so thatthe products of combustion enter the fire box. 8 is an opening into 1through which the air nozzle 9 containing the fuel nozzle 10 enters thechamber. 11 is a door closing an opening 12 into l through which thelnitial fire is started 13, 13, 13, are openlngs near the bottom of 1 toallow the products of combustiony to escape out into the re box of thefurnace and are placed near the bottom sov that when the ire 1s notburning the radiation of heat out of 1 1s reduced to a minimum. 14 is aplpe connecting 9 to an air blower 15 operated by an electric motor 17resting upon a base 16. E is the body of the burner nozzle 10 having anadjusting handle D and connected by a pipe 20 to the fuel tank 21'having a filler opening 22 and a pressu e gauge 23. The pipe 20 has ahand va ve f and passes through a valve 25 which is operated by anelectric current being open when the current is on. 0 27 1s anintermittent electric switch havlng conducting segments 29 29 connectedtogether by wires 30 with spaces 3l between. 26 is an electricconducting hand operated by a train of clock work and by means of thewire 28 connects the segments 29 to the motor 17. 32 is a wireconnecting 29 to one of the wires C of a source of electric supply. 33is a wire connecting 25 with the other wire C1 of the electric supply.34 is a wire connecting 25 to 17. 35 is a wire connecting 28 and themotor 17 to an electric switch 24 controlled by the temperature of thefurnace or house and thence to the wire C The operation ofthe differentparts is as follows:

After the fuel is placed in 21 and under pressure, a piece of lightedwaste can be thrown into the chamber l through 11 and 12 and theelectric current turned on and valve F opened. The motor 17 wouldl beconnected to electric supply on one side by 34 and 35 through 25 and inthe other side by either or both wires 32 and 35, 32 through 27 and 28and 35 through switch 24 `The valve 25 is immediately Iopened by theelectric current and fuel iiows to the nozzle 10 at the same time. Themotor 17 starts 15 and blows an air blast to the nozzle 9, the fuel isat once lighted by waste and goes on burning until both the switches 27and 24 cut off the current 27 because the v- Aboiler or house dropsbelow the cause the temperature of the house or boiler is high enough.25 would at once cut od the t'uel and 17 would stop. -las chamber l islined with a heat-resisting and nonconducting material the temperatureyinside will be above and will stay above the lash point of the fuel forsome time, and before it drops below such a point the switch 27 is soadjusted as to cut in the current and the heat of the chamber will atonce ignite the fue] and which by the adjustment of 27 will stay lightedlong enough to reheat the chamber' 1. The spaces 31 and segments 29 andtime of turning of 26 are adjusted so as to keep the temperature in labove the flush point of the fuel. At the same time if the-temperatureot the pre etermined point the switch 24 will cut in Vthe current roundthe switch 27 and operate the burner until such temperature 1s reached.The switch 27 is then used to keep the temperature of chamber l abovethe flash point of thefuel while the switch 24 controls the temperatureof the boiler or house.

l do not restrict myself to the use of any special kind of a spraynozzle or intermittent switch or thermostaticall operated switch ormotor or air blower. ny one of several dil'erent forms may be used andthe device illustrated is to be considered as being merely anexempliication of my inven tion.

l have sought to set forth the principle of my invention and the bestmode in which l at present contemplate using that prin- `ci le.

am aware that an intermittent oil burner.

using a gas pilot light has been used. l

hereitore do not make such a claim broadly ll claim: i

l. An apparatus, using liquid fuel for generating heat, for use with afurnace or a boiler, and being a combination of a combustion chambermade of heat resisting and nonconducting material ormaterials, and soconstructed, with reference to the furnace or boiler, as to retainwithin itself a self tiring degree of temperature for some timeafter thefuel is cut oil, with means for spraying la fuel mixture into thecombustion chamber, and with means for intermittently cutting on and ottthe fuel mixture in such a manner that it is on often enough and longenough, to keep the temperature of the comn bustion chamber at all timesabove the firing point of the fuel mixture, all substantially asdescribed.

2. An apparatus, using liquid fuel for generating heat, for use with afurnace or a boiler, and being a combination of a combustion chambermade of heat resisting and nonconducting material or materials, and soconstructed, with reference to the furnace or boiler, as to retainwithin itself a self firing degree of .temperature for some time afterthe fuel is cut eti, with means for spraying a fuel mixture `into thecombustion chamber, with means tor intermittently cut ting on and ottthe fuel mixture in suchva manner that it is on etten enough and longenough, to keep the temperature of the combustion chamber at all timesabove the tirQ ing point of the fuel mixture, and with means forautomatically controlling the supply ot fuel mixture so as to meet theemgencies of the *furnace or boiler, all substantiall as described.

lT lEDllltliCl FRASER MILLER.

